Tropical Cyclone Products

Public Advisory (TCP)
  • A plain-language interpretation of the JTWC warning bulletin.
  • Provides latest information on tropical storm/typhoon watches and warnings.
  • Issued at least every 6 hours when a tropical cyclone is expected to affect WFO Guam's Area of Responsibility with 48 hours.

  • Local Statement (HLS)
  • Specific forecast for each island under a watch or warning, including rain, wind, surf, storm surge, as well as recommended preparations.

  • Position Estimate (TCE)
  • Hourly estimated position of a tropical cyclone within the range (about 230 miles) of Guam's Doppler radar.
  • Issued hourly near the top of the hour when a center fix is available.